Hot-air furnace



(No Model.) 2 Sheets-Sheet 2. H GOWLES HOT AIR FURNAGE.

Patented Mar. 1l, 1890.

ill

. UNITED STATES PATENT OFFICE.

HENRY COl/VLES, OF UTICA, NEW YORK.

HOT-AIR FU RNACE.

SPECIFICATION forming part of Letters Patent No. 422,921, dated March11, 1890.

Application tiled July 22, 1889. Serial 110,318,273. (No model.)

This invention rela-'tes to hot-air furnaces;`

and it has for its object to construct a furnace which shall be simpleand efficient, and in which the heat shall be retained for a sufficientlength of time to cause it to be imparted by radiation to thesurrounding air, thus making the furnace economical in op-` eration.

The invention consists in the improved construction, arrangement, andcombination of parts, which will be hereinafter fully described, andparticularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a perspective view of. afurnace embodying my improvements, with parts of the exterior orsurrounding casing broken away to show the construction. Fig. 2 is avertical sectional view of the same.

Fig. 2. i

Like numerals of reference indicate like parts in all the figures.

which may be had through auf opening 3 in the front side ofsaidibase,.in which may be arranged a door having suitabledraftopenings. Such a door, however, may be dispensedI with.

The base 1 supports the grate 7, which may be of any desiredconstruction; and the said base likewise supports'the fire-pot, whichmay be composed of two or more annular sections 8 S, the meeting edgesof which have Joints of any suitable construction.

Fig. 3 is a horizon` tal sectional view taken on the line n a' in` 12has au opening 14, surrounded by an an I nular flange l5.

The rear side of the dome or combustionchamber has an opening 16, atwhich is bolted an upwardly-extending elliptical or oval flue 17, theupper end of which has an annular fiange 1S. Suitably mounted in thelower part of the iiue 17 is a damper 19, which may be operated by meansof achain 20, extending over suitably-arranged pulleys 21 to the frontside of the furnace,'where it may be conveniently reached andmanipulated. The iue 17 ,is provided with a rearwardly-extending branch22, upon which is mounted ya pipe 23, to which the smoke-pipe isin turnconnected. The pipe 23 is provided on its under side with adraftnegulator consist-ing of a valve-casing 24, the opening of whichhas a valve or damper 25, which may be operated by means of a rod 26,extending upwardly to any desired point.

27 designates a radiator, which consists of'an annular chamber ordrumconstructed preferably of rolled steel-plate and provided at its loweredge with openings 2S 29, surrounded by flanges 30, and adapted to beconnected, respectively, to the flange 15 of the casing 12 and to theiiange 1S of the flue 17, thus conp u g nectingthe said radiator withthe interior of 1 designates the base of my improved furnace, whichforms the ash-pit 2, access to the furnace. The front side of theradiatorcasing is provided with a door-opening 3l, ar ranged directlyabove the door-casing 12, and through which access may be had to theinterior of the radiator forthe purpose of cleaning the same andremoving accumulations of soot and similar obstructions.

- The furnace is inclosed in the usual manner by a casing 40. To saidcasing is bolted a frame el, having a door Ll, hinged by its lower edgeand provided with handles 5 5, forming stops which, when the said dooris thrown open, will support it in a partly-inclined position. The upperand side edges of said door are provided with iianges 6 to guide waterinto a box or receptacle which extends from the frame 41 into theair-space between the furnace and its casing when the said receptacle isbeing iilled. The object of this device is to meisten the air within thecasing, which latter is to be connected in the IOO usual manner withducts for the admission of the cold and the exit of the heated air.

The operation of my invention will be readily understood from theforegoing description, taken in connection with the drawings heretoannexed. The furnace is charged through the door 13, and when the fireis started a direct draft may be had by opening the damper 19 in theiiue 17. After the fire has been well started the said damper 19 isclosed and the products of combustion will then pass through theopening` 14 in the doorcasing 12 up into the radiator, traverse thelatter on opposite sides thereof and then pass downwardly through theopening 29 into the flue 17 and thence out through the smokepipe. In theradiator 27, directly above the opening 29, is arranged a horizontalvplate or defiector 33, which serves to cause the products of combustionwhich rise from the flue 2O to take a'devious course before escapingthrough the radiator. The draft may be regulated by means of the valveor damper 25, through which cold air in any desired quantity may beadmitted into the smokepipe. Said draft-regulator being located on theunder side of the smoke-pipe, there will be no danger of smoke escapinginto the room. When it is desired to clean the radiator, this may bedone by means of an ordinary scraper which is inserted through theopening 31. The soot and dirt may thus be scraped directly through theopening 14 into the door-casing 12, from whence it will drop into thefire-pot and thence into the ash-pit.

It will be seen by the construction of my improved furnace the productsof combustion will ascend into the upperportion of the-dome or firefpotand likewise into the upper portion of the radiator, where they willremain until the heat shall have been effectually given off to thesurrounding air, when they will be replaced lby more intensely-heatedparticles.

the combustion-chamber, substantially as set forth.

2. In a furnace, the combination of the dome or combustion-chamber, adoor casing or frame bolted to the front side of the same and having ahinged charging-door and provided with an opening in its upper side, anupwardly-extending flue bolted to the rear side of saidcombustion-chamber, an annular radiator surrounding the upper portion ofthe combustion-chamber and connected with the opening in the upper sideof the door-casing and with the upwardly-extending iiue, a smoke-pipeextending from the latter and having a damper or.draftregulator, and adamper arranged in the upwardly-extending flue between the smokepipe andthe combustion-chamber, substantially as set forth.

3. In a furnace, the combination of the combustion -chamber, thedoor-casing secured to the same and having an opening at its upper side,theflue secured to the rear side of the combustion-chamber,-the annularradiator secured or connected to said flue and to the opening of thedoor-casing, and an opening in said radiator arranged directly above theopening in the door-casing, substantially as and for the purpose setforth.

4. In a furnace, the combination of Vthe combustion-chamber, thedoor-casing secured to the front side of the same and having au openingin its upper side, the upwardly-ex- ICO tially as and for thepurposeherein setforth.

In testimony that I claim the foregoing as my own IV have hereto affixedmy signature in presence of two witnesses.

`l`HENRY UOVVLES. Witnesses:

JOHN EDGAR, JOHN J. BURKE.

